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Data Scientist

Role: Data Scientist

Assesses data preparation, applied statistics, machine learning, experimentation and communication of results with Python and SQL. Designed to screen data scientists on data-driven teams.

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Sample questions

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As the candidate sees it

Data Scientist

8 questions26 min
  1. 1.Short text

    In SQL, which clause filters groups after a GROUP BY aggregation?

    Example: list only the customers with more than 5 orders. SELECT customer_id, COUNT(*) AS orders FROM orders GROUP BY customer_id ___ COUNT(*) > 5; Answer with the name of the clause.

  2. 2.Short text

    Which validation technique splits the data into k parts and trains and tests the model k times?

    In each round, a different part is used for testing and the rest for training, which gives a more stable performance estimate. Answer with the name of the technique.

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6 more questions in the full template.

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What comes back to you

Short text

In SQL, which clause filters groups after a GROUP BY aggregation?

Answer

78

Score

Why this score

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